In 1920, when the league began, teams came from five states: Ohio, Illinois, Indiana, New York, and Michigan. Only the Cardinals and the Bears are the remaining original teams.
Helmets weren’t required until 1943.
The Chicago Bears have played the most games in all the history of the NFL. Since being active since 1920, they’ve played 1,422 games.
The Houston Texans are the youngest team. They became active in 2002, making them only 17 years old!
The largest point spread was 26.5. In 2013, the Denver Broncos were the favorites against the Jacksonville Jaguars.